Electrodynamic sound transducer

Abstract

An electrodynamic sound transducer has a diaphragm, a dome and a surround and a voice coil. The sound transducer further has a first magnet ring and a second magnet ring as part of the magnet system, the first magnet ring and second magnet ring being arranged on opposite sides of the diaphragm. The voice coil is coupled with the diaphragm and is arranged approximately on or outside of the circumference of the first magnet ring and second magnet ring.

The invention claimed is: 
     
       1. An electrodynamic sound transducer comprising:
 a diaphragm forming a closed surface, the diaphragm comprising:
 a dome; and 
 a surround; 
 
 a voice coil that is fastened to the diaphragm; 
 a first magnet ring defining a first plane on one side of the diaphragm; 
 a second magnet ring defining a second plane on a second side of the diaphragm; 
 wherein the voice coil or the dome is arranged between the first plane and second plane; 
 wherein a magnetization direction of the first magnet ring is opposite to a magnetization direction of the second magnet ring; 
 wherein the first magnet ring is beveled at a side facing the diaphragm, and the second magnet ring is beveled at a side facing the diaphragm, and beveled sides of the first and second magnet rings are adapted to a geometry of the diaphragm; 
 wherein, in cross section, the beveled side of the first magnet ring is parallel to the beveled side of the second magnet ring; and 
 wherein an inner diameter of the voice coil substantially corresponds to an outer diameter of the first magnet ring, an outer diameter of the second magnet ring, or both. 
 
     
     
       2. The electrodynamic sound transducer according to  claim 1 ;
 wherein the first magnet ring is arranged in a resonator and the second magnet ring is arranged on a frame. 
 
     
     
       3. The electrodynamic sound transducer according to  claim 1 ;
 wherein a diameter of the first magnet ring corresponds to a diameter of the second magnet ring. 
 
     
     
       4. The electrodynamic sound transducer according to  claim 1 ;
 wherein the diaphragm has a flat dome or a flat coil seat. 
 
     
     
       5. The electrodynamic sound transducer according to  claim 1 ;
 wherein at least one of the voice coil and a lead thereof is printed on the diaphragm.